She always wears a tulip hat and speaks in philosophical, life-lesson-like phrases. However, since she mostly answers in the negative, Aki often calls her "cynical." Furthermore, she sometimes says plausible-sounding things just to dodge a question, making it difficult to understand her true intentions. While she has an elusive and detached personality, she holds her own convictions, stating that Sensha-do "contains everything important in life." She is never seen without her kantele. Even during matches, she doesn't let go of it, playing the Finnish folk song "Säkkijärven polkka" while fighting. At first glance, it seems like this would make it hard to grasp her surroundings, but she is an incredible girl with sharp tactical eyes, noticing enemy tanks attempting to ram her and sensing traps in enemy encirclements even while playing.

She boards the BT-42 and serves as the loader and turret traverser (and possibly the gunner). She often hangs around Mika and shows interest in her philosophical words. In the story, when she heard the phrase "Sensha-do contains everything important in life," she didn't quite understand it at first, but she seemed to grasp it after seeing the interaction between Miho Nishizumi and Alice Shimada at the end. She has a friendly personality and is eager to have matches and exchanges with other schools, wanting to make many friends. However, she is also a girl with ulterior motives, hoping that these friendships will lead to being treated to feasts or receiving gifts like futons.

She serves as the driver of the BT-42. She possesses outstanding driving skills and utilizes them to fight powerful enemies during matches. She has a lively and boisterous personality, demonstrated by her driving techniques and her habit of eating grilled shrimp whole, shells and all. Unlike Mika and Aki, she was usually seen in her jersey match outfit, but she finally showed off her school uniform for the first time in the 4th episode of "Das Finale."